import router from './router'
import { ElMessage } from 'element-plus'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'
import { getToken } from '@/utils/auth'
import { isHttp, isPathMatch } from '@/utils/validate'
import { isRelogin } from '@/utils/request'
import useUserStore from '@/store/modules/user'
import useSettingsStore from '@/store/modules/settings'
import usePermissionStore from '@/store/modules/permission'

NProgress.configure({ showSpinner: false })

const whiteList = ['/login', '/register']

const isWhiteList = (path) => {
  return whiteList.some(pattern => isPathMatch(pattern, path))
}

// 递归函数：确保路由名称唯一（添加父路由名称前缀）
const ensureUniqueRouteNames = (routes, parentName = '') => {
  return routes.map(route => {
    // 克隆路由对象避免修改原始数据
    const newRoute = { ...route }

    // 处理路由名称唯一性
    if (newRoute.name) {
      // 如果是嵌套路由，添加父路由名称前缀
      if (parentName) {
        newRoute.name = `${parentName}_${newRoute.name}`
      }
    }

    // 递归处理子路由
    if (newRoute.children && newRoute.children.length > 0) {
      newRoute.children = ensureUniqueRouteNames(newRoute.children, newRoute.name)
    }

    return newRoute
  })
}

router.beforeEach((to, from, next) => {
  NProgress.start()
  if (getToken()) {
    to.meta.title && useSettingsStore().setTitle(to.meta.title)
    /* has token*/
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else if (isWhiteList(to.path)) {
      next()
    } else {
      if (useUserStore().roles.length === 0) {
        isRelogin.show = true
        // 判断当前用户是否已拉取完user_info信息
        useUserStore().getInfo().then(() => {
          isRelogin.show = false
          usePermissionStore().generateRoutes().then(accessRoutes => {
            // 根据roles权限生成可访问的路由表

            // 修改点1：确保路由名称唯一
            const uniqueRoutes = ensureUniqueRouteNames(accessRoutes)

            uniqueRoutes.forEach(route => {
              if (!isHttp(route.path)) {
                // 修改点2：更严格的路由存在性检查
                const routeExists = router.getRoutes().some(r =>
                    r.name === route.name ||
                    (r.path === route.path && r.meta?.title === route.meta?.title)
                );

                if (!routeExists) {
                  router.addRoute(route) // 动态添加可访问路由表
                } else {
                  console.warn(`路由 ${route.name || route.path} 已存在，跳过添加`)
                }
              }
            })
            next({ ...to, replace: true }) // hack方法 确保addRoutes已完成
          })
        }).catch(err => {
          useUserStore().logOut().then(() => {
            ElMessage.error(err)
            next({ path: '/' })
          })
        })
      } else {
        next()
      }
    }
  } else {
    // 没有token
    if (isWhiteList(to.path)) {
      // 在免登录白名单，直接进入
      next()
    } else {
      next(`/login?redirect=${to.fullPath}`) // 否则全部重定向到登录页
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  NProgress.done()
})
